Recent content by Miles B

I wasn't addressing lensing/reflections etc, I was addressing the temperature coefficient calculation. That is garbage. If you want to give examples where a margin is valid, that's fine. But the re-rating due to assuming max irradiance at annual min temp is not realistic.

I'm aware of that calculation, but I'm also aware it's of no use. Panels will never see stc irradiance at the lowest ambient temp for my location. Because that temp was at 4am in winter. The whole process of calculating that voltage is stupid. The only time voc is encountered is on mppt startup...

No need to continue this thread.. I found a great deal on a pair of Growatt SPF5000ES inverters locally.

Why? The only component I can see that could be affected would be a DC contactor. Does anyone actually know what happens if you exceed the rated PV, or have an array with greater Isc than the inverter's Isc max? I'm interested to know. It's really a moot point. I said that in response to that...

That's the title, but it is not the entirety of the topic. Please read the first paragraph of my initial post. You have jumped in and talked about inverters that my initial post did not ask about. Then you have brought up Victron, which costs almost 4x the EASun/MPP units, has lower charger...

Right, well that's not even the unit this thread is about, nor the one you linked to in the video, nor is it built by the same manufacturer. I am talking about Voltronic units. Specifically ISolar-SM-IV-5.6KW. So... read the manual?

For the price difference, 15W is nothing. 0.36kWh per day. Victron also has no charge controller in the unit. And their charge controllers are low voltage which are basically worthless today.

Yeah I did... he gives no reasons and I have no respect for his opinions.

Why would you not put more than 4800W of panels on it? He says "for obvious reasons". Uh, no, there are no obvious reasons. You can happily put a shitload more panels on any MPPT as long as you don't exceed Vocmax. This is common practice to get max output across more hours. Exceeding Iscmax is...

Thankyou very much for your post. I was looking at this seller.. think I will probably buy from them. https://easunpower.com/products/pre-sale-easun-power-hybrid-solar-inverter-11.2kw-230vac-mppt-120a-solar-charger-pv-input-6000w-450vdc-led-ring-lights-touchable-button-ship-from-eu

What's the frequency? Can you shut down the inverter and still see the voltage? Do you have another load you can put on the panels with the inverter off? A properly sized resistance should do it. Do you have any connection between the string wiring and the panel frames? Where are the panels...

I have read a handful of comments where people ask if EASun and MPP are the same product internally. There have been a few replies stating that "the internal components are lower quality". I am very skeptical. Does anybody have any actual knowledge that EASun is not the same product? I am aware...

You need to get someone else to do this.

You haven't said what you were testing the voltage across, how your system is laid out etc. I'm not sure you should be doing this.

This has to be either a high resistance joint in the housing, or you shorted the panels through the fuses.